Flood control and drainage irrigation device

The utility model relates to a flood control and drainage irrigation device which comprises a dam, a plurality of diversion canals are arranged on the dam, and the diversion canals are connected with a water storage pond. The reservoir is connected with the irrigation unit; the irrigation unit comprises an outer shell; a water inlet pump is arranged on the outer shell; a water outlet pump is arranged at the bottom of the outer shell; the water outlet pump is connected with water distribution pipes; a filter layer assembly is arranged in the outer machine shell. A gravel suction mechanism is arranged on the outer side of the outer machine shell. After river water is pumped out of the water storage pond through the water inlet pump and transferred into the outer machine shell, the river water can directly flow to a gravel filtering plate of the filtering layer assembly under the action of gravity, the gravel filtering plate can screen gravel from the water, and the gravel is left on the filtering plate; after a